Streaks - The to-do list that helps you form good habits.
UpNote - A beautiful and clean cross-platform app for notes organizer
Taskful - Deadlines, meet your match.
Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.
Gone - An ephemeral to-do list
Note Board - Productivity app. Save information like a sticky notes.